Basic Maths for Protein Crystallographers | |
Resolution |
The length of the reciprocal lattice vector
ha^{*}+kb^{*}+lc^{*}
is called d^{*} and equals
.
Crystallographers often define |S|² as (d^{*})² or
.
S, a vector, is defined as s-s_{0}, where
s is in the direction of the scattered wave, and
s_{0} is in the direction of the incident wave.
Protein crystallographers talk about resolution in terms of 1/d^{*} (or d), hence the 'high resolution'
limit is actually a small number.